JPH04194490A - Branch pipe joint - Google Patents

Abstract

PURPOSE:To surely prevent a socket short pipe from being detached by adjusting an engaging position in an engaging part by operating a cam rotated, lifting a stopper part of the socket short pipe relating to an original pipe and a saddle, and compressibly deforming a rubber ring so that it can be press-attached to a mounting port internal diameter part. CONSTITUTION:In a branch pipe joint 10, an engaging position between a recessed engaging part 15A, provided in a saddle 13, and a recessed engaging part 18A, provided in a thrust receiving part 18 of a socket short pipe 12, is adjusted by operating a handle 15B of a cam 15 rotated. In this way, constitution is provided such that a stopper part 21 of the socket short pipe 12 is lifted relating to an original pipe 11 and the saddle 13 to compressibly deform a rubber ring 4 so that it can be press-attached to an internal diameter part of a mounting port 11A. Since the recessed engaging part 15A of the cam 15 and the recessed engaging part 18A of the thrust receiving part 18 are engaged by rotating the cam, a lift position of the stopper part 21, lifted by adjusting the engaging position between both the engaging parts, can be steplessly adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a branch pipe joint used when providing a branch part in the middle of a piping line such as a sewer.

[Conventional technology]

In conventional branch pipe joints, when attaching a short socket pipe for connecting a branch pipe to an attachment port provided on a main pipe, a saddle is glued to the outer circumference of the main pipe so as to tightly fit it, and the saddle is attached to the saddle. A short tube will be installed.

In addition, in other conventional branch pipe joints, a caulking material is filled between the outer circumference of the original pipe and the saddle to improve water-stopping properties.

[Problem to be solved by the invention]

However, since the above-mentioned conventional technology constructs a branch pipe joint by a wet attachment method using the adhesive side, the workability is poor and there is a limit to the improvement in water-stopping properties and strength.

Furthermore, if the original pipe has ribs on the outer periphery of the pipe body, the saddle needs to be closely attached along the complicated rib shape in order to ensure high water-stopping properties, which complicates construction.

In addition, in order to construct a branch pipe joint using a dry installation method that does not use adhesive in conventional branch pipe fittings, press the tip of the short pipe into the rubber ring provided at the fitting port of the original pipe. (For example, see Utility Model Application Publication No. 56-90582)
However, there is a concern that the short pipe may come off.

In the present invention, when attaching the short socket pipe to the attachment port of the original pipe,
The purpose is to improve workability, improve water-stopping properties and strength, and reliably prevent the short pipe from coming off.

Moreover, even if the original pipe has ribs on the outer periphery of the pipe body, the present invention has a simple structure, which improves ease of construction.
The purpose is to improve water-stopping properties and strength, and to reliably prevent the short pipe from coming off.

[Means to solve the problem]

The present invention as set forth in claim 1 provides a branch pipe joint in which a short socket pipe for connecting a branch pipe is attached to an access port provided in a master pipe, in which the pipe is located on the inner surface side of the periphery of the access port in the master pipe. A plurality of locking parts that can be locked to the inner surface of the peripheral edge of the socket are provided at the tip of the short socket tube, and the outer peripheral part of the short socket tube is located on the outer surface side of the peripheral edge of the socket in the original pipe. Attach a saddle in contact with the outer surface of the peripheral edge of the socket, and insert a saddle with a width equal to or greater than the wall thickness of the original tube between the locking part and the saddle attachment part on the outer periphery of the short socket tube. A rubber ring facing the inner diameter of the mounting port is attached, and a rotatable cam is interposed between the thrust receiving part provided on the outer periphery of the short socket pipe and the saddle, and the receiving part is inserted by rotating the cam. By adjusting the engagement position between the thrust receiving part on the short pipe side and the engaging part provided on the saddle, the locking part of the short pipe is pulled up against the original pipe and the saddle, and the rubber ring is compressed. It is designed so that it can be deformed and crimped onto the inner diameter part of the attachment opening.

The present invention according to claim 2 is characterized in that the original tube has a rib on the outer periphery of the tube body, and the saddle is provided with a seating surface that follows the shape of the rib, and the saddle is provided with a seating surface that follows the shape of the rib, so that the peripheral edge of the attachment opening of the original tube has a rib. It is designed to be attached to the outside.

[Effect]

According to the present invention as set forth in claim 1, there are the following effects (1) and (2).

■By rotating the cam, the rubber ring installed on the outer periphery of the short socket tube is compressed and deformed, and is crimped onto the inner diameter of the installation port of the original tube.It is a dry installation method that does not use adhesive. Because of this, it has good workability and can improve water-stopping properties and strength.

■Since the locking part provided at the tip of the short socket tube can be locked to the inner surface of the peripheral edge of the socket, there is no fear that the short socket tube will come off.

According to the present invention as set forth in claim 2, there is the following effect (2).

■Even if the original tube has ribs on the outer periphery of the tube body, high water-stopping properties can be ensured by the above method (■).In order to ensure high water-stopping properties, the saddle should be placed closely along the complex rib shape. There is no need for complicated construction.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, an example of the branch pipe joint of this invention is demonstrated based on drawing.

FIG. 1 is a cross-sectional view of essential parts showing a branch pipe joint according to a first embodiment of the present invention, FIG. 2 is an exploded view showing the components of the branch pipe joint of FIG. 1, and FIG. FIG. 4 is a cross-sectional view showing the shape of the tip end of the short socket pipe; FIG. 4 is a schematic diagram showing the state of engagement between the saddle recess engaging portion and the thrust receiving portion recess engaging portion by the cam; FIGS. 5 to 7 The figures are sectional views of main parts showing branch pipe joints according to the second embodiment, the third embodiment, and the fourth embodiment of the present invention, respectively.

(First Embodiment) The branch pipe joint IO is as shown in Figs. 12, and its constituent parts are a saddle 13, a rubber ring 14, and a cam 15.

The short socket pipe 12 is constructed by assembling and joining a small diameter neck part 16 and a large diameter socket part 17 by adhesive or fusion,
The end face of the large diameter socket part 17 is a thrust receiving part 18, and the large diameter socket part 17 is provided with a rubber ring mounting part 19 to which a rubber ring 14 interposed between the large diameter socket part 17 and the branch pipe is mounted.

However, the branch pipe joint 10 has a connection port 1 in the original pipe 11.
At the tip of the short socket tube 12 (ie, the tip of the small-diameter neck portion 16) located on the inner surface of the peripheral edge of the attachment port 11A, a locking portion 21 that can be locked to the inner surface of the peripheral edge of the attachment port 11A is provided. The locking part 21 is
As shown in FIG. 3, the tip of the short socket pipe 12 is divided into multiple parts (for example, four parts) on the outer periphery of the tip, and has an appropriate size that is slightly larger than the hole diameter of the fitting port 11A and can be inserted into the fitting port 11A. It is protrudingly molded.

In addition, the branch pipe joint 10 has an attachment port 11 in the original pipe 11.
On the outer periphery of the short socket pipe 12 located on the outer surface side of the A periphery,
A saddle 13 is attached to the outer surface of the edge of the attachment port 11Aff. A cylindrical bulge 13 is provided at the center of the saddle 13.
A is formed protrudingly. The inner surface of the cylindrical bulging portion 13A and the outer surface of the small-diameter neck portion 16 of the short socket tube 12 facing each other are provided with uneven projections and grooves (not shown) that engage with each other. It is meticulously arranged. The engagement between the projection and the groove positions the small diameter neck portion 16 and prevents it from rotating.

In addition, the branch pipe joint 10 has an attachment opening of the original pipe 11 with a width equal to or larger than the wall thickness of the original pipe 11 between the locking part 21 on the outer periphery of the short socket pipe 12 and the saddle 13 attachment part. 11A
A rubber ring 14 facing the inner diameter part is attached.

Further, the branch pipe joint 10 has a rotatable cam 15 interposed between the thrust receiving portion 18 provided on the outer periphery of the short socket pipe 12 and the saddle 13. 15B is a handle.

Further, the branch pipe joint 10 has a cam 15 as shown in FIG.
By adjusting the engagement position between the concave engaging portion 15A provided on the saddle 13 and the concave engaging portion 18A provided on the thrust receiving portion 18 of the short socket tube 12 by rotating the handle 15B, the original tube 11 and the socket short pipe 12 for the saddle 13
The locking portion 21 is pulled up, and the rubber ring 14 is compressed and deformed to be press-fitted to the inner diameter portion of the attachment opening 11A.

In the above embodiment, the concave engaging portion 15 of the cam 15
The thrust receiving part on the side of the short socket pipe 12 that engages with A is constituted by a thrust receiving part 18 that is integrated with the short socket pipe 12. However, the thrust receiving part of the 12 short socket pipes is
It can also be configured with a separate thrust ring.

Next, the operation of the first embodiment will be explained.

■By rotating the cam 150, the rubber ring 14 provided on the outer periphery of the short socket pipe 12 is compressed and deformed, and is crimped onto the inner diameter of the attachment port 11A of the main pipe 11. It is a dry method that does not use adhesive. Because it is an attached method, it has good workability and can improve water-stopping properties and strength.

(2) Since the locking part 21 provided at the tip of the short socket tube 12 can be locked to the inner surface of the peripheral edge of the fitting port 11A, there is no fear that the short socket tube 12 will come off.

Incidentally, since the concave engaging part 15A of the cam 15 and the concave engaging part 18A of the thrust receiving part 18 are engaged by the rotation of the cam, the locking part 21 is pulled up by adjusting the engagement position of both. The lifting position can be adjusted steplessly.
As a result, the dimensional tolerance of the rubber ring 14 and the dimensional tolerance of the hole diameter of the attachment port 11A can be absorbed.

(Second Embodiment) The branch pipe joint 30 is substantially different from the main branch pipe joint 10 in that the original pipe 11 has a rib 11C on the outer circumference of the pipe body 11B, and the saddle 13 has the shape of the rib 11C. Seating surface 1
3A and is attached to the outer surface of the peripheral edge of the attachment port 11A of the original tube 11.

According to the second embodiment, although the original pipe 11 has the rib IIC on the outer circumference of the pipe main body 11B, the branch pipe joint 10
Since high water-stopping properties can be ensured in the same manner as in the above, there is no need for complicated construction such as making the saddle 13 closely fit along the complicated shape of the rib 11C in order to ensure high water-stopping properties.

(Third Embodiment) The branch pipe joint 40 is substantially different from the above-described branch pipe joint 10 in that the rubber ring in the branch pipe joint 1O is attached at the upper part of the periphery of the original pipe attachment port 11A, and This is because the space has been changed to a space surrounded by the outer peripheral surface of the short tube 12 and the inner recessed portion of the saddle 13.

According to the third embodiment, since the storage space for the rubber ring is secured, only a certain amount of compressive deformation is applied to the rubber ring, and therefore, stable water-stopping performance can be ensured over a long period of time.

(Fourth Embodiment) The branch pipe joint 50 is substantially different from the branch pipe joint 10 described above in that the mounting structure of the cam 15 in the branch pipe joint 10 is a thrust receiver provided on the outer periphery of the short socket pipe 12. The center of the cam is rotatably attached to the small diameter neck portion 16 of the short socket tube. Incidentally, the cam may be rotatably attached to the thrust receiver or a part of the saddle.

According to the fourth embodiment, with a simple configuration, it is possible to improve workability, improve water-stopping properties and strength, and reliably prevent detachment of the short socket pipe.

〔Effect of the invention〕

As described above, according to the present invention as set forth in claim 1, when attaching the short socket pipe to the attachment port of the original pipe, it is possible to improve workability, improve water-stopping properties and strength, and further improve the water-stopping property and strength. It is possible to reliably prevent the short tube from coming off.

Furthermore, according to the present invention as set forth in claim 2, even if the original pipe has ribs on the outer periphery of the pipe main body, the simple structure improves workability and improves water-stopping properties and strength. Furthermore, detachment of the short socket pipe can be reliably prevented.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts showing a branch pipe joint according to a first embodiment of the present invention, FIG. 2 is an exploded view showing the components of the branch pipe joint of FIG. 1, and FIG. A cross-sectional view showing the shape of the tip end of the short socket pipe, FIG. 4 is a schematic view showing the state of engagement between the concave engaging part of the saddle and the concave engaging part of the thrust receiver by the cam, and FIG. FIG. 6 is a cross-sectional view of essential parts showing a branch pipe joint according to a third embodiment of the present invention, and FIG. 7 is a cross-sectional view of main parts showing a branch pipe joint according to a third embodiment of the present invention. It is a principal part sectional view showing a branch pipe joint concerning an example. 10.30.40.50: Branch pipe joint, 11: Original pipe, 1
1A: Attachment port, IIB: Pipe body, 11C: Rib, 12:
Socket short pipe, 13: saddle, 13A second seating surface, 14: rubber ring, 15: cam, 15A, 18A: concave engagement portion, 18 nislast receiving portion, 21: locking portion.

Claims (2)

[Claims] (1) In a branch pipe joint in which a short socket pipe for connecting a branch pipe is attached to a fitting opening provided on the main pipe, the tip of the short socket pipe located on the inner side of the peripheral edge of the fitting port in the main pipe. A plurality of locking parts that can be locked on the inner surface of the peripheral edge of the fitting are provided on the outer peripheral part of the short socket pipe located on the outer surface side of the peripheral edge of the fitting in the original tube. Attach a saddle that is in contact with the outer surface of the tube, and attach a saddle to the inner diameter of the attachment port of the source tube with a width greater than the wall thickness of the source tube between the locking portion and the saddle mounting portion on the outer periphery of the short socket tube. A rotatable cam is interposed between the saddle and the thrust receiving part provided on the outer periphery of the short socket pipe, and the thrust receiving part on the short socket pipe side is installed by rotating the cam. By adjusting the engagement position of the engagement part provided on the main pipe and the saddle, the engagement part of the socket short pipe is pulled up with respect to the original pipe and the saddle, and the rubber ring is compressed and deformed to adjust the inner diameter of the attachment port. A branch pipe joint characterized in that it can be crimped to the branch pipe joint. (2) The original tube has a rib on the outer periphery of the tube body, and the saddle is provided with a seating surface that follows the shape of the rib and is attached to the outer surface of the peripheral edge of the attachment opening of the original tube. Branch pipe joint according to 1.